Commit 6319193

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TST: Remove defunct test_nowrite_df

(Supposedly) pandas now returns a copy for `df.values`. `df.to_numpy()` doesn't work either ... 🙄

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Original file line number	Diff line number	Diff line change
`@@ -584,23 +584,6 @@ def test_max_tries(self):`
`584`	`584`	`**OPT_PARAMS)`
`585`	`585`	`self.assertEqual(len(heatmap), 6)`
`586`	`586`
`587`		`- def test_nowrite_df(self):`
`588`		`- # Test we don't write into passed data df by default.`
`589`		`- # Important for copy-on-write in Backtest.optimize()`
`590`		`- df = EURUSD.astype(float)`
`591`		`- _ = df.values.ctypes.data # dummy call for the value to stabilize!`
`592`		`- mem_addr = df.values.ctypes.data`
`593`		`- assert mem_addr == df.values.ctypes.data`
`594`		`-`
`595`		`- class S(SmaCross):`
`596`		`- def init(self):`
`597`		`- super().init()`
`598`		`- assert mem_addr == self.data.df.values.ctypes.data, (mem_addr, self.data.df.values.ctypes.data)`
`599`		`-`
`600`		`- bt = Backtest(df, S)`
`601`		`- _ = bt.run()`
`602`		`- assert mem_addr == bt._data.values.ctypes.data`
`603`		`-`
`604`	`587`	`def test_multiprocessing_windows_spawn(self):`
`605`	`588`	`df = GOOG.iloc[:100]`
`606`	`589`	`kw = {'fast': [10]}`

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